Wearing a loose vest or shirt may help hide them. You can get male bra's though. They are made for adolescent boys and men that have developed large breasts. This is a condition called Gynecomastia. Some men prefer to have reduction surgery but Compression bras and vests are available.
no
Wear a strapless bra.
Wear a jock strap.
Yes. In fact he should to wear it as a supporting clothing piece. It is not bad, just clothing....we have many stupid prejudices to break.
There is no "best" bra size.
In their Bra!
Gynecomastia
On her bra
Sports bra
There are a few good gynecomastia surgeons in Boston. Places to find the surgeons would include Boston Plastic, Plastic Surgeons Find the Best, and Yelp.
To cover the bra so its not see threw or to hide fat